An Ecological Study of Buckeye Lake. 53 



2. Oxycoccus-Sphagnum-Dulichium arundinaceum society : 

 (Fig. 19). Dulichium arundinaceum is an extremely widely dis- 

 seminated sedge, it is not only very abundant in the meadow 

 but also frequent in the thicket and bog-forest. It is clearly a 

 dominant species over noticeable areas of the meadow. The pro- 



FiG. 19. — Oxycoccus-Sphagnum-Dulichium arundinaceum society. In 

 the distance to the right Eryophorum virginicum, in the center and to the 

 left Osnnmda cinnamomea with the strict habit typical of this plant in 

 the open bog. 



minently three-angled stem thickly set with divergent leaves are 

 characters which clearly distinguish it from the other sedges. 



3. Oxycoccus-Sphagnum-Rynchospora alba society: — Ryn- 

 chospora alba favors parts of the meadow with high water level. 

 It is frequent in the wet paths and other shallow depressions of 

 the meadow. 



4. Oxycoccus-Sphagnum-Carex filiformis society: — To- 



